timeout – The number of seconds to wait for results before
the operation times out.

propagate – If any of the tasks raises an exception, the
exception will be re-raised.

interval – Time to wait (in seconds) before retrying to
retrieve a result from the set. Note that this
does not have any effect when using the amqp
result store backend, as it does not use polling.

callback – Optional callback to be called for every result
received. Must have signature (task_id,value)
No results will be returned by this function if
a callback is specified. The order of results
is also arbitrary when a callback is used.
To get access to the result object for a particular
id you will have to generate an index first:
index={r.id:rforringres.results.values()}
Or you can create new result objects on the fly:
result=app.AsyncResult(task_id) (both will
take advantage of the backend cache anyway).

no_ack – Automatic message acknowledgement (Note that if this
is set to False then the messages will not be
acknowledged).